Afire truck is equipped with a horn that produces sound waves at a frequency of 1000hz. if the truck is moving at a velocity of 25m/s on a hot summer day with temperature of 40 degrees celcius. a) find the velocity of sound at 40 degree celcius
use this velocity to find the frequency of the sound as heard by an observer when the truck is
b) approaching the observer and
c) moving away from the observer

answer: the answer is a

gravity

explanation:

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.